scispace - formally typeset
Search or ask a question

Showing papers on "Banyan switch published in 1988"


Journal ArticleDOI
TL;DR: In this article, an all-optical fiber-optic crossbar switch capable of interconnecting N input fibers to M output fibers with an arbitrary interconnect pattern has been constructed, which can use any 1-D or 2-D spatial light modulator capable of realizing N X M pixels and can be configured for permutations, full or partial broadcast, or wired-oring of several inputs to a given output.
Abstract: An all-optical fiber-optic crossbar switch capable of interconnecting N input fibers to M output fibers with an arbitrary interconnect pattern has been constructed. The switch can use any 1-D or 2-D spatial light modulator capable of realizing N X M pixels and can be configured for permutations, full or partial broadcast, or "wired-oring" of several inputs to a given output. Values of N and M achievable depend on the light efficiency of the switch components and the data rate. A 4X4 switch has been built; in a computer switching environment, the approach is capable of realizing a 16 X16 switch at 1 Gb/s and a 32 X32 switch at >100 Mb/s. The development of the switch has included construction of both a PLZT switch array and a magneto-optic switch array. We report on the investigations of both technologies. Reconfiguration times in the range of a few microseconds to a few tens of microseconds are of interest. A reconfiguration time shorter than 20 ps was actually achieved.

62 citations


Journal ArticleDOI
TL;DR: In this article, high-order, bidirectional, DC-20-GHz switch networks are discussed using single-chip 1*2, 1*4 and 2*2 switch MMICs.
Abstract: High-order, bidirectional, DC-20-GHz switch networks are discussed. Single-chip 1*2, 1*4, and 2*2 switch MMICs have been demonstrated. Multiple chips have been used to demonstrate 4*4 and 1*16 switches. The switches all use a combination of series and shunt passive FET switching elements. The 1*4 switch is made of a single stage of switching elements, rather than the usual two stages of 1*2 switches. The 2*2 switch is comprised of two stages of 1*2 switches. The multiple-chip 4*4 switch is made of four stages of 1*2 switches (using the 2*2 switch MMICs). Two stages of 1*4 switches are used to make the 1*16 switch. >

37 citations


Journal ArticleDOI
TL;DR: A 2*2 optical self-routing switch using integrated laser diode optical switches is proposed, which can perform large-scale switching functions using less hardware than a crossbar switch and is composed of a Benes network.
Abstract: A 2*2 optical self-routing switch using integrated laser diode optical switches is proposed. The switch is composed of a Benes network, which can perform large-scale switching functions using less hardware than a crossbar switch. The path each data stream takes through the interconnection network is determined by the binary bits of its destination address, and self-routing is accomplished by monitoring terminal voltage changes in gain guides induced by input optical signals which are injected into a p-n junction. Concentrated control is not necessary, and large optical multistage switches can be easily constructed because complicated electrode patterns are not necessary. >

18 citations


Proceedings ArticleDOI
19 Feb 1988
TL;DR: In this article, an all-optical fiber-optic crossbar switch capable of interconnecting N input fibers to M output fibers with an arbitrary interconnect pattern has been constructed.
Abstract: An all-optical fiber-optic crossbar switch capable of interconnecting N input fibers to M output fibers with an arbitrary interconnect pattern has been constructed. The switch can use any 1-D or 2-D spatial light modulator capable of realizing NxM pixels, and can be configured for permutations, full or partial broadcast, or "wired oring" of several inputs to a given output. Values of N and M achievable depend on the light efficiency of the switch components and the data rate. A 4x4 switch has been built; in a computer switching environment, the approach is capable of realizing a 16x16 switch at 1 Gb/s and a 32x32 switch at 100 Mb/s. The development of the switch has included construction of both a PLZT switch array and a magneto-optic switch array. We will report on the investigations of both technologies. Reconfiguration times in the range of a few microseconds to a few tens of microseconds are of interest.

14 citations


Journal ArticleDOI
TL;DR: In this article, a new approach to achieve polarisation independence and demonstrate the operation of a 2 × 2 switch was proposed, which uses optical switch matrices cascaded in tandem configurations.
Abstract: We propose a new approach to achieve polarisationindependence and demonstrate the operation of a 2 × 2 switch. This method uses optical switch matrices cascaded in tandem configurations. With this approach, switching voltage is determined only by the strongest electro-optic effect.

8 citations


Journal ArticleDOI
S.A. Cassidy1, P. Yennadhiou1
TL;DR: The principles of a D-fiber space switch are described, and the switching characteristics predicted and measured enable a fully transparent network, i.e. totally nonblocking with minimum restriction on optical bandwidth, to be realized.
Abstract: An optical space switch based on D-fibers has been fabricated and its use in switching networks investigated. The characteristics of a switching network depend not only on the nature of the switches used, but also on the architecture utilized. In general, architectural complexity can be used in a trade with switch specification to achieve a given network behavior. Several architectures are reviewed and their consequences on the switch specification evaluated. The principles of a D-fiber space switch are described, and the switching characteristics predicted and measured. The characteristics of the switch, within its optimum architecture, enable a fully transparent network, i.e. totally nonblocking with minimum restriction on optical bandwidth, to be realized. The limits to the size of such a network are calculated using the measured characteristics of a switch fabricated in the laboratory. >

5 citations